| Presentation | 2006/11/16 A Study on Noise Reconstruction System Based on System Identification with Variable Step Size Naoto SASAOKA, Masatoshi WATANABE, Yoshio ITOH, Kensaku FUJII, Sumio TUIKI, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We have investigated a noise reconstruction system (NRS) as a noise reduction system. The NRS uses a linear prediction error filter (LPEF) and a noise reconstruction filter (NRF). An input signal of a LPEF becomes a white signal. Assuming that background noise is generated by exciting a linear system with a white signal, the background noise can be reconstructed from white noise by estimating the linear system. It is a NRF based as system identification that estimates the linear system. However, in case a fixed step size for updating tap coefficients of a NRF is used, it is difficult to reduce the background noise while maintaining the high quality of enhanced speech. Therefore, a variable step size for normalized least mean square (NLMS) is proposed in this paper. In a speech section, a small step size is used so as not to estimate speech, while a large step size is used to track the background noise in a non-speech section. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Noise Reduction / System Identification / NLMS Algorithm / Variable Step Size |
| Paper # | SIS2006-56 |
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| Conference Information | |
| Committee | SIS |
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| Conference Date | 2006/11/16(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Registration To | Smart Info-Media Systems (SIS) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Study on Noise Reconstruction System Based on System Identification with Variable Step Size |
| Sub Title (in English) | |
| Keyword(1) | Noise Reduction |
| Keyword(2) | System Identification |
| Keyword(3) | NLMS Algorithm |
| Keyword(4) | Variable Step Size |
| 1st Author's Name | Naoto SASAOKA |
| 1st Author's Affiliation | Faculty of Engineering, Tottori University() |
| 2nd Author's Name | Masatoshi WATANABE |
| 2nd Author's Affiliation | Faculty of Engineering, Tottori University |
| 3rd Author's Name | Yoshio ITOH |
| 3rd Author's Affiliation | Faculty of Engineering, Tottori University |
| 4th Author's Name | Kensaku FUJII |
| 4th Author's Affiliation | Graduate school of Engineering, University of Hyogo |
| 5th Author's Name | Sumio TUIKI |
| 5th Author's Affiliation | Faculty of Engineering, Tottori University |
| Date | 2006/11/16 |
| Paper # | SIS2006-56 |
| Volume (vol) | vol.106 |
| Number (no) | 373 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |